i think its pyrogen.
by the way if mods permit, in the same thread, i want to know how do pyrogens help us...
is it like- stimulus[=?]----->WBCs----->pyrogens------>higher temp.--
-----> more K.E. ...high reaction rate[= higher chances of collission of WBCs/Abs or other immunoproteins with the pathogen]------>higher chances killing or blocking certain pathogen.

If this is the mechanism, then, this improvement in the chances of killing due to pyrogenesis occurs for every pathogen irrespective of stimulator pathogen but is magnitudally different for different pathogens.

i want to know how do pyrogens help us... is it like- stimulus[=?]----->WBCs----->pyrogens------>higher temp.-- -----> more K.E. ...high reaction rate[= higher chances of collission of WBCs/Abs or other immunoproteins with the pathogen]------>higher chances killing or blocking certain pathogen. If this is the mechanism, then, this improvement in the chances of killing due to pyrogenesis occurs for every pathogen irrespective of stimulator pathogen but is magnitudally different for different pathogens.